The prefabricated buildings are leaving Pennsylvania on "low boy" tractor trailers, with extra axles and lowered beds designed to handle big loads.

WSJ: Bathrooms' Long Trek to Replace Sandy-Wrecked Facilities

The workers are housed in long prefabricated buildings or, for the luckier ones, traditional gers, circular felt tents (equipped with untraditional en suite facilities, TV and Ethernet cables).

ECONOMIST: Booming Mongolia